Slide fastener stop blank



' Oct. 24, 1950 A. E. CARLILE sums FASTENER STOP BLANK Filed Nov. 26,1948 INVENTOR. Alfred E Carlile BY I ATZRNEYS Patented Oct. 24, 19502,526,802 SLIDE FASTENER s'ror BLANK Alfred E. Carlile, Brooklyn, N. Y.,assignor to National Fastener Corporation, a corporation of New YorkApplication November 26, 1948, Serial No. 61,991

1 Claim. 1

The invention relates to slide fasteners, and more especially to theproduction of separable bottom end stops for such fasteners.

The primary object of the invention is to provide a separable bottom endstop construction for slide fasteners which is economical tomanufacture, easy to assemble and effective in operation.

Another object of the invention is to provide a construction of thistype the parts of which are die cast.

A further object of the invention is to provide, in a device of thistype, a female member having means thereon for frictionally holding aslider in position when the two parts are being coupled by the user.

Still another object of the invention is to provide male and femalemembers for a device of this type, in which there are channels forreceiving the beads of the tapes, these channels being substantiallyclosed at their lower ends, at least before assembly on the tape, sothat, in assembling the parts on the tapes, the beads of the latter maybe slid in as far as they will go, and then clamped on the tapes,eliminating the necessity of exact positioning of the parts on the tapesduring this part of the manufacture of a complete slide fastener.

More especially, and particularly in connection with the female member,the invention contemplates that, during the die casting thereof, thereshall be left across the lower end of the bead-receiving channel a thinflashing, enough to stop the movement of the tape into the channelduring assembly, but thin enough to be crushed when the channel iscompressed to secure the element on a tape.

Further objects and advantages of the invention will appear more fullyfrom the following description, especially when taken in conjunctionwith the accompanying drawings which form a part thereof.

In the drawings:

Fig. l is a top plan view of a female member produced according to theinvention, the member being shown as cast and before application to thetape bead;

Fig. 2 is a side elevation thereof;

Fig. 3 is an end view thereof, from the righthand side of Fig. 2;

Fig. 4 is a perspective view thereof;

Fig. 5 is a side elevation of the male member, also as cast and beforeapplication to the tape;

Fig. 6 is a top plan view thereof;

Fig. 7 is an end view thereof, from the right hand side of Fig. 5; and

Fig. 8 shows in side elevation the male and female members assembled ontheir tapes and coupled, the slider being omitted for clarity.

The female member, as die cast, includes spaced front and back walls 2,4 connected by a transverse wall 6 separating recess 8 which is toreceive the bead of the tape from recess ill for the male member. Therecess ID has a relatively thick bottom wall l2, and inwardly directedflanges l4 leaving between them a slot Hi. The upper portion iii of thisslot is wider than the lower part, since the flanges [4 are not as highas the front and back walls 2, 4.

The tape receiving portion of the female memher, as cast, has theportions of walls 2, 4 divergent. These walls are considerably thickerthan the portions defining well It, and have thinner upward extensions20, 22, of the same height as wall 6. Well 8 is further enclosed byflanges 24, 26 of the same thickness as the corresponding portions ofwalls '2, 4, these flanges leaving between them a slot 28. The portionof wall 6 above the main walls 2, 4 also has a vertical slot 30extending downward from its top edge.

During the casting of the female member, the dies are so arranged (as,for example, by leaving the block which forms well 8 slightly above theblock on which the bottom of the member is formed) as to leave a thinflashing 32 across the bottom of well or recess 8. This flashing is ofsuch thickness (for example, five one-thousandths of an inch) that itwill stand a moderate manually exerted pressure, as when an assemblerinserts the end of a tape until it abuts against the flashing, but isweak enough to yield and be crumpled up when the assembled parts areacted on by a crimping machine to clamp the female member on a tape.

The arrangement thus provided thus forms a pair of polygonal recesses orwells for the tape and the male member.

The male member (Figs. 5 to 7) is also polygonal in cross-section. It isformed of a side wall 34, front and rear walls 36, 38, divergent fromone another when cast, and flanges 40, 42 leaving between them a slot44. Wall 34 has an inward taper at the top (Fig. 5). All the wallsconverge towards the bottom, so that the bottom of the channel formed bythe walls is substantially closed.

In assembling a slide fastener embodying theunits hereinbeforedescribed, a tape 46 having a bead 48 and suitable fastener elements 50is folded at a predetermined distance below the lowest fas- .tenerelement, the fold being held by stitching walls then lying substantiallyparallel and the edges of the flanges 24, 26 substantially engaging tape46 between them.

The assembly of the male member on thetape is accomplished in a generallsimilar manner. The folded tape is then inserted from above until thebead, because of the substantially closed bottom of the male member, canmove no further, and the male member is then clamped on the head, thefront and rear walls then occupying substantially parallel positions,and the edges of flanges 40, 42 clamping the tape. The first fastenerelement will then occupy the proper position with respectto the upperend of the male element.

When the female element is thus clamped on the tape, the projectingupper portion will have parallel walls on each side of the tape and onthe front and rear faces thereof. The latter walls are longitudinallysplit. Thus when a slider is moved downward until its wings engage overthe projection, it will, if the thickness of its channel is slightlyless than thethickness of the'projection, clamp the two divided parts ofthe projection towards each other. This will cause the slider to gripthe projection frictionally. so as to lessen the danger of accidentalupward displacement while the male member is being inserted through theslider into the female member. The proper operation of the separablebottom stop is thus made easier and more certain.

As will be evident from the foregoing, my invention facilitates theassembly of the parts of a separable bottom stop fastener, since theproper location of the male and female members on the tapes is assuredsimply by locating the lower edges of the tapes (as by folding orcutting) at the proper distance below the fastener elements I0. Nospecial gauging of distance during the clamping of the elements on thetape is then necessary.

While I have described herein one embodiment of my invention, I wish itto be understood that I do not intend to limit myself thereby exceptwithin the scope of the claims hereto or hereinafter appended.

I claim:

In a die-cast element for application to a tape having a bead thereon asone of the elements of a separable bottom stop of a slide fastener,means REFERENCES CITED The following references are of record in thefile of this patent:

UNITED STATES PATENTS Number Name Date 1,606,282 Witter Nov, 9, 19261,898,925 Anderson Feb. 21, 1933 2,027,708 Seaver Jan. 14, 19362,115,369 Marinsky Apr. 26, 1938 2,153,035 Burt Apr. 4, 1939 2,203,125Beauchamp June 4, 1940 2,444,904 Worley July 6, 1948

